Breeding of Biomphalaria tenagophila in mass scale

Revista do Instituto de Medicina Tropical de São Paulo

Florence Mara Rosa²  Daisymara P. Almeida Marques¹  Engels Maciel¹  Josiane Maria Couto¹  Deborah A. Negrão-corrêa¹  Horácio M. Santana Teles¹  João Batista Dos Santos¹  Paulo Marcos Zech Coelho¹ 

[1] ,Universidade Federal de Juiz de Fora Instituto de Ciências Biológicas Laboratorio de Parasitologia MG ,Brazil

关键词: Mass scale breeding;    Biomphalaria;    Biomphalaria tenagophila;    Resistant lineage;    Schistosoma mansoni;   

DOI  :  10.1590/S0036-46652013000100007

来源: SciELO

【 摘 要 】

An efficient method for breeding Biomphalaria tenagophila (Taim lineage/RS) was developed over a 5-year-period (2005-2010). Special facilities were provided which consisted of four cement tanks (9.4 x 0.6 x 0.22 m), with their bottom covered with a layer of sterilized red earth and calcium carbonate. Standard measures were adopted, as follows: each tank should contain an average of 3000 specimens, and would be provided with a daily ration of 35,000 mg complemented with lettuce. A green-house effect heating system was developed which constituted of movable dark canvas covers, which allowed the temperature to be controlled between 20 - 24 ºC. This system was essential, especially during the coldest months of the year. Approximately 27,000 specimens with a diameter of 12 mm or more were produced during a 14-month-period. The mortality rates of the newly-hatched and adult snails were 77% and 37%, respectively. The follow-up of the development system related to 310 specimens of B. tenagophila demonstrated that 70-day-old snails reached an average of 17.0 ± 0.9 mm diameter. The mortality rates and the development performance of B. tenagophila snails can be considered as highly satisfactory, when compared with other results in literature related to works carried out with different species of the genus Biomphalaria, under controlled laboratory conditions.

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